I just had my engine replaced with another used engine (95 4 runner 3VZE V6 3.0) and now the check engine light is on. The engine seems to run fine but I noticed the check engine light just came on. I checked and codes 14 & 71 are appearing. I read thru the manuals and see what the possible problems could be but I wanted to see if anyone has had these codes and what should I should go after first. I'll start looking at all the trouble areas in the meanwhile.